Final Fantasy Realm reborn. Cant open launcher error codes . Help

My mate has bought ff xiv real reborn for the pc. And has early access. I know right now the servers are down for a few hours but thats not the problem.

He played the beta fine, and now he cant open the launcher. I have restored the pc back to the date the launcher worked. Ive redownloaded the launcher deleted all the files and it just wont open im getting error saying

"ff xiv launcher a system error has occured ; - 2146697211
http://frontier.ffxiv.com/arr_win/index.html?rc_lang=en-us"

i tried as admin, i tried compatibility mode. I updated the graphics drivers and still the same error. I installed the launcher on my laptop (same laptop dell inspiron 15 r 7520. And the launcher opens, i can log in and start to download the game files.

His cant even get that far. Hes Not done work till later tonight but he saying if we cant get it to open he wants to do a full reinstall of windows. Which is going to be time consuming and then loads of steam and origin downloads and so forth.

If anyone could help me it would be greatly apreciated

least most of u guys can get the launcher open hah

thanks in advanced